27915401 has 2 divisors, whose sum is σ = 27915402. Its totient is φ = 27915400.

The previous prime is 27915397. The next prime is 27915409. The reversal of 27915401 is 10451972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22848400 + 5067001 = 4780^2 + 2251^2 .

It is a cyclic number.

It is not a de Polignac number, because 27915401 - 2² = 27915397 is a prime.

It is a super-2 number, since 2×27915401² = 1558539225981602, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27915409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13957700 + 13957701.

It is an arithmetic number, because the mean of its divisors is an integer number (13957701).

Almost surely, 2^27915401 is an apocalyptic number.

It is an amenable number.

27915401 is a deficient number, since it is larger than the sum of its proper divisors (1).

27915401 is an equidigital number, since it uses as much as digits as its factorization.

27915401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 27915401 is about 5283.5027207337. The cubic root of 27915401 is about 303.3527643901.

It can be divided in two parts, 2791 and 5401, that added together give a 13-th power (8192 = 2¹³).

The spelling of 27915401 in words is "twenty-seven million, nine hundred fifteen thousand, four hundred one".